Abstract: A suspension preheater adapted to be connected to the feed end housing of a rotary kiln or the like, whereby kiln exhaust gas emerging from the feed end housing passes through the preheater in countercurrent heat exchange relation with particulate feed material for the kiln which passes through the preheater from a feed inlet end contiguous the upper end of the preheater to a feed discharge end at the lower end of the preheater, comprising one or more cyclone means arranged in series gas and particulate feed material flow relation with respect to each other, means for admitting the particulate feed material from a feed material supply source to the upper portion of the preheater, a hollow preheating chamber at the lower portion of the suspension preheater, the hollow preheating chamber having the upper end thereof in gas and material flow communication with the upper end of the lowermost of the cyclone means, the lower end of the hollow preheating chamber being in gaseous flow communication with the feed end

Abstract: The use of a baffle (61) spaces the horizontal cleaning air discharge a substantial distance below the accelerator rolls (32, 33) to substantially reduce passage of cleaning air to the threshing area (18). This in turn reduces the amount of dirty air discharged from the forward end of the combine in the area of the operator's cab (26).

Abstract: Roller grate apparatus for simultaneously transporting and transferring heat to or from a bed of material particles has elongated cylindrical parallel horizontal rollers rotatably driven in the same direction; filler bars disposed in the nip between adjacent rollers and together with the rollers forming a generally flat surface with constantly moving portions which continually tumble the material particles and urge them thereacross in a direction transverse to the roller axes; gas passage apertures in the rollers which permit a heat transfer gas stream to pass through the rollers; a heat transfer chamber spanning the rollers; and a fan for blowing a heat transfer gas stream through the chamber and the material bed being transported by the rollers.

Abstract: An intercooler mounted on the cylinder head with an intake manifold of an internal combustion engine. The intake manifold and cylinder head are adapted for fastening together for operation with or without the intercooler mounted between the manifold and the cylinder head. The use of a sandwich type intercooler arrangement permits use of standard components of the manifold or engine head with the optional use of the intercooler as a turbocharged engine or without as a naturally aspirated engine.

Abstract: Roller grate material bed conveying and heat transfer apparatus which provides plural bed depths has cylindrical horizontal rollers driven in the same direction with gas passage apertures in the rollers and filler members in the nip between adjacent rollers. Means are provided to pass heat transfer gas streams through the bed as the rollers urge the material particles in a direction transverse to the roller axes and continually tumble the particles so that all surfaces thereof are exposed to the gas streams. A first plurality of rollers are positioned in a first generally horizontal plane to receive the material fed to the apparatus, and a second plurality of rollers downstream from the first rollers are at elevations lower than the first horizontal plane and preferably are driven at slower speed than the first rollers to thereby increase the material bed depth downstream from the first horizontal plane as the material particles are hardened by heat and can withstand greater bed depth without crushing.

Abstract: A grinding system and method for grinding mineral ore which is adapted for use where ore is required to be fed for grinding from a supply source at a substantially constant rate of feed, and in which the grinding characteristics of the ore and the power required to grind a predetermined weight of the ore vary unpredictably during the grinding operation, comprising a primary semi-autogenous grinding mill and a primary fully autogenous grinding mill connected in parallel relation with each other to the ore supply source, first drive means for driving the semi-autogenous grinding mill, power sensing means for measuring the input power required to drive the semi-autogenous grinding mill, and means for varying the ore feed rate to the semi-autogenous grinding mill whereby to maintain the input power to the semi-autogenous grinding mill at a substantially constant value or set point.

Abstract: An articulated plow has a front section 12 supported at its front end by a ground engaging furrow wheel 19, a rear section 13 supported at its rear end by a ground engaging furrow wheel 22, pivot joints 32, 33 interconnecting the diagonally disposed frames 14, 16 of the end-to-end front and rear sections 12, 13 on a transverse articulation axis 31 and central support wheels 23, 24 which contact the ground forwardly of the articulation axis 31 to produce a counter moment acting on the rear section 13 to counteract the tendency of the rear plow bottoms to operate at a reduced plowing depth.

Abstract: A hydraulic detent release for a power shift transmission selector valve which releases the detent with decay of fluid pressure in the valve. The hydraulic detent releases in response to pressure decay in an inching valve which causes the selector valve to return to the low speed position when the inching valve is operated.

Abstract: An engine block and crankshaft bearing seal sealing the main bearing cap with the block and the periphery of the crankshaft.

Abstract: A pivoted safety door for a harvester is disposed ahead of the concave and has a separately pivoted lip which normally rests on a front edge of the concave. An adjustably biased detent mechanism releases the lip, permitting it to pivot out of engagement with the concave, when a rock or the like of substantial size attempts to enter the threshing chamber and is engaged by the threshing rotor. A first manual control is provided for pivoting the main body of the door from its tripped position to a closed position. A second manual control is provided for pivoting the lip relative to the door to restore it to its detented position, this last mentioned function being effected after the main body of the door has been restored to a closed position. The detent mechanism for the lip includes a pair of adjustably loaded spring biased plungers which act on opposite sides of a detented part.

Abstract: A relieve valve in a hydraulically operated clutch for the residual pressure caused by centrifugal force on the hydraulic fluid tending to produce limited engagement of the clutch.

Abstract: A fixed upstream seal is provided having a variable geometry to provide a maximum body thickness at points of large deflection and a minimum body thickness at points of small deflections with the body thickness varying in progressively from maximum to minimum and minimum to maximum for predetermined halves of the circular seal. Also, a fixed downstream seal is provided having a variable geometry to provide minimum body thickness at points of large axial rotor deflection.

Abstract: An extendible and pivotal steering column for a vehicle having a wedge lock extension mechanism for providing an extension and pivotal arrangement of the upper end of the steering column pivotally mounted within the operator station of the vehicle.

Abstract: In a mixing zone of a mixing vessel, comminuted lime is fed into emission gas and carried out of the vessel with the gas to a cyclone separator. Gas from a cyclone is passed through a quench zone and excess dust from the cyclone is introduced into the gas stream for additional sulfur-dioxide removal. Off-gas from the preheat zone which contains unburned combustibles is burned in a booster heater with the heat being utilized as process heat. Excess preheat off-gas not required for preheat process is delivered to a second combustion furnace and the heat utilized for drying. From the quench zone the gas passes to two dust separators with the cleansed gas being utilized in up-draft and down-draft drying zones. Make-up lime is fed to the mixing zone from a suspension calcining furnace, reaching the mixing zone while still heated.

Abstract: A multiple section fold-up agricultural implement is provided with a folding support (61) for the outboard section (13). When the outboard section (13) is pivoted from its aligned position with the adjacent implement section (12), as shown in FIG. 2, to its folded position as shown in FIGS. 3 and 4, a long support arm (62) swings from a low silhouette position of FIG. 2 to an extended bracing position wherein the cradle (76) on the end of the support arm (62) abuts the frame member (77) of the outboard section (13) sufficiently far from the folding axis (26) to adequately support outboard section (13), particularly in its inverted position, shown in FIG. 4, wherein excessive forces would otherwise be imposed on the folding mechanism (45) during travel over rough terrain.

Abstract: A wafer type butterfly valve having a spherical segment body interior contoured to receive a disc seal having upstream and downstream seals. The seals are configured to fit disc grooves and are curved to fit the body contour. Mechanical retainers are provided and there is provision for adjustably applying pressure to the seals.

Abstract: A fabricated split pump casing is disclosed in which the suction chamber and discharge chamber are both on the same side of the casing section. The volute is fabricated from a plurality of sections with the minor section of the volute being located within the suction chamber thereby providing maximum suction chamber area.

Abstract: A folding tool bar with hollow main and wing sections (12, 21, 22) incorporates restraining links (111, 112), disposed within the hollow main section (12) when the wing sections (21, 22) are lowered to their working positions, which not only serve to limit upward folding movement of the wing sections (21, 22) but also form a passageway for the hydraulic hoses (126, 127) extending from the interior of the hollow main section (12) to the interiors of the hollow wing sections (21, 22) thereby protecting the hoses (126, 127) against damage at the folding connections.

Abstract: A multiple rotary gas lock apparatus using a buffer seal gas is disclosed to enable the transfer of solid materials into or out of a pressurized process containing high temperature, flammable or toxic gases. The buffer seal gas, has a pressure higher than the process pressure and is introduced between two series connected gas locks; this prevents process gas backflow to the feed system. Buffer seal leakage gas from the first pair of gas locks and air from a third gas lock are removed from an opening in a connection between the pair of gas locks and the third gas lock at subatmospheric pressure. This system enables control and usuage of toxic or flammable gases as a buffer for mixing compatibility with the process gas when a suitable inert gas is not available. It also prevents the flow of any toxic gas to the worker environment.

Abstract: A resilient air cut-off pad 52 for an air planter is provided with an area of gradually decreasing thickness in the form of a seed discharge ramp 66 which has a rounded bottom 68 aligned with the circular path of the circumferentially spaced seed pockets 47 on the seed singulating disk 33. The seeds in the pockets 47 are relieved of pressure from the resilient pad 52 by their registration with the ramp 66 as they approach the trailing edge 54 of the pad 52. This insures that the seeds drop by gravity at uniform spacing without resilient thrust being imparted thereto by the trailing edge.